The Deepsea Challenge was incompatible with many of the more automated elements in the Superlative
link Chronometer testing. Why? Because
link it's too thick, and the machines used to test the Deepsea to its entirely non-casual 3,900 meters of water resistance (that's 4,388 meters
link in actual testing) don't even come close to what Rolex required to test the record-setting Deepsea Challenge. Rolex had to rethink the entire process for a single reference.